US4530582A - Exposure aperture frame construction for camera - Google Patents

Exposure aperture frame construction for camera Download PDF

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Publication number
US4530582A
US4530582A US06/537,423 US53742383A US4530582A US 4530582 A US4530582 A US 4530582A US 53742383 A US53742383 A US 53742383A US 4530582 A US4530582 A US 4530582A
Authority
US
United States
Prior art keywords
film
exposure aperture
aperture frame
partition member
leader
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
US06/537,423
Other languages
English (en)
Inventor
Hiroshi Hara
Takashi Tobioka
Takeshi Yoshino
Tetuo Nishikawa
Jiro Sekine
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fujifilm Holdings Corp
Original Assignee
Fuji Photo Film Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Fuji Photo Film Co Ltd filed Critical Fuji Photo Film Co Ltd
Assigned to FUJI PHOTO FILM CO., LTD., reassignment FUJI PHOTO FILM CO., LTD., ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: HARA, HIROSHI, NISHIKAWA, TETUO, SEKINE, JIRO, TOBIOKA, TAKASHI, YOSHINO, TAKESHI
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Publication of US4530582A publication Critical patent/US4530582A/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B1/00—Film strip handling
    • G03B1/42—Guiding, framing, or constraining film in desired position relative to lens system
    • G03B1/48—Gates or pressure devices, e.g. plate
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B17/00—Details of cameras or camera bodies; Accessories therefor
    • G03B17/28—Locating light-sensitive material within camera
    • G03B17/30—Locating spools or other rotatable holders of coiled film

Definitions

  • the present invention relates to an exposure aperture frame construction for an auto-loading camera which is adapted to receive a film container including a coiled filmstrip and to load a film automatically therein.
  • a film advancing means such as a sprocket drum or endless belt adjacent to a film supply chamber which, in turn, receives a film container including a coiled filmstrip having a leader extending therefrom, and a film take-up spool located in the film take-up chamber of the camera which operates to automatically wind the advanced film leader into the film take-up chamber.
  • film loading can be completed only by closing a back cover after insertion of a film container into the film supply chamber.
  • the filmstrip contained in a container generally has a leader previously drawn into some extent out of the container, the length of which, as is well known to those in the art, depends on the brand.
  • the exposure aperture disclosed in the Japanese Pat. Application does not solve the problem for tightly curled, specialized or otherwise complicated film leaders. That is to say, a door member as a partition of the exposure aperture frame which is merely pivotally mounted does not always ensure that the film leader is successfully directed to the film take-up chamber, because the leading end of the leader pushes the door open while it is still caught inside the upper portion of the door.
  • an exposure aperture frame for auto-loading cameras which includes a pivotally mounted partition taking the form of a door which, in turn, has an surface on the opposite side include toward a film supply chamber for directing a film leader to the film take-up chamber.
  • a pivotally mounted partition taking the form of a door which, in turn, has an surface on the opposite side include toward a film supply chamber for directing a film leader to the film take-up chamber.
  • Such an exposure aperture frame permits reliable advancement of any film leader to the film take-up chamber, even if it is short, special in shape or tightly curled.
  • the door is adapted to be detachably mounted on a shaft and to be releasably engaged by a leaf spring, so that it is easily incorporated into and removed from a camera for repairing or cleaning an interior mechanism of the camera.
  • a platform member the provision of which permits the arrival of the film leader at the film take-up chamber without any standstill is formed integrally with the partition, by which a simplified and low cost manufacturing of the exposure aperture frame is achieved.
  • FIG. 1 is a partially exploded perspective view of the camera with its back cover fully opened and with which an exposure aperture frame construction embodying the present invention cooperates;
  • FIG. 2 is a partially exploded perspective view of the exposure aperture frame construction shown in FIG. 1;
  • FIG. 3 is a partial elevational view of the exposure aperture frame construction also shown in FIG. 1;
  • FIG. 4 is an enlarged fragmentary cross sectional view taken along line IV--IV of FIG. 3.
  • FIG. 1 there is shown a camera with its back cover fully opened which is provided with an exposure aperture frame in accordance with the present invention.
  • a camera body 1 having essential mechanisms installed therein and an objective or taking lens 2 mounted thereon is provided with a back cover 3 which, in turn, has swing arms 3a pivotally connected to the camera body 1 for pivotal opening and closing movement in the direction shown by an arrow A-B.
  • the back cover 3 is adapted to be maintained in its closed position by means of a latch member 4 located on the bottom portion of the camera body 1 in a well-known manner.
  • the camera body 1 is further provided with a film supply chamber 5 into which a film container P is inserted endwise, i.e., axially into an entrance opening at the bottom of the camera body 1 and a film take-up chamber 6 wherein a take-up spool 7 and an film auto-loading arrangement well-known per se are disposed.
  • the arrangement comprises, for instance, a guide plate 8 having a roller 8a rotatably secured thereto which, in turn, is pivotably mounted on the camera body 1 and urged by means of a spring so as to conduct a film leader F toward the inside of the film take-up chamber 6 and then to press, by the roller 8, the conducted film leader F onto the peripheral surface of the take-up spool 7 for automatic film loading.
  • an exposure aperture 9 is defined by an exposure aperture frame 10 as described in detail later through which scene light passes and then impinges upon film.
  • Locating the endless belt 12 as film advancing means in the vicinity of the mouth of the film supply chamber 5 results in that the teeth 12a can positively enter into the perforations Fb of the film leader F when the film container P is inserted for threading the film leader in a passageway into the film supply chamber 5.
  • a supporting member designated at 13 which has a pressure plate 16 resiliently coupled thereto is rigidly secured to the camera body 1 by means of set screws 14 to provide a straight slot in cooperation with guide surfaces 15 through which the film leader F which is normally curled is held straight and inserted edgewise first into the passageway between the pressure plate 16 and the guide rails 11 a and 11b as the film container P is inserted into the entrance opening to the film supply chamber 5 for film loading.
  • Resilient coupling of the pressure plate 16 to the supporting member 13 permits the pressure plate 16 to move away from the guide rails 11a and 11b, providing enough space for threading the film leader F when the back cover 3 is opened.
  • the pressure plate 16 is urged by leaf spring 18 mounted on the back door 3 to press the film against the guide rails 11a and 11b and thereby hold it flat in the focal plane when the back cover 3 is fully closed.
  • a transparent member denoted by numeral 19 is a window provided in the back cover 3 through which the film container P is visually recognizable.
  • a door member 21 forming a partition of the exposure aperture frame 10 is located opposite to the film take-up chamber 6 and is pivotably mounted on a pivot pin 22 through a bore 21a.
  • the door member 21 serves as a partition and is toward a position where it defines one side of the exposure aperture 9 by means of a leaf spring 23 having a projection 23a at its one end portion which enters into a recess 21b formed in the outer side wall of the door for the purpose of preventing the door member 21 from coming off the pivot pin 22.
  • a guide means 24 having an inclined surface 24a located in an axial position where unwanted light rays for forming an image are blocked thereby.
  • the provision of the guide means permits the film leader to ride across the door member 21 when it is advanced toward the film take-up chamber 6.
  • the door member 21 is further provided with a platform member 25 extending toward the film take-up chamber 6 from the top of the outer wall thereof for preventing the film leader F which has ridden across the door member 21 from falling into a space adjacent the take-up spool 7 and for thereby successively winding the film leader F onto the take-up spool 7.
  • an opening 25a in the platform for easy access to the leaf spring therethrough in order to engage and disengage the projection 23a with the recess 21b of the door member 21 for assembling and removing the door member 21 from the camera body 1.
  • the film loading operation in this embodiment will be described hereinafter.
  • the film container P is first inserted endwise, i.e., axially into the film supply chamber 5 from which the film leader F is extended toward the film take-up chamber 6 and is inserted edgewise, i.e., longitudinal edge first into the straight slot provided by the supporting member 13. Then the curled leader F is held straight and threaded in the passageway defined by the pressure plate 16 and guide surfaces 15. As a result of this, insertion of the film container P into the film supply chamber 5 is completed and the drawn film leader F is located over the exposure aperture 9.
  • the film leader F is pressed against the guide rails 11a and 11b by the pressure plate 16 which is urged by the leaf spring 18 as the back cover 3 is fully closed and thereby held in the focal plane of the taking lens 2.
  • the film leader F if insufficient to extend beyond the exposure aperture frame, may fall at its forward end Fa into the exposure aperture 9 because of its curling.
  • the completion of insertion of the film container P with the insufficient film leader F extending therefrom is followed by the circular movement of the endless belt 12 which is caused by the rotational movement of a driving means and thereby advanced to the film take-up chamber 6.
  • the forward end of the film leader F pushes the guide means 24 and hence forces the door member 21 to rotate clockwise as shown by the arrow against the leaf spring 23.
  • the forward end of the film leader is forwardly advanced along the inclined side surface 24a of the guide means 24 to the top of the door member 21, finally riding across the door member 21.
  • the forward end Fa of the film leader F after riding across the movable door member 21, permits it to pivot counterclockwise under the influence of force of the leaf spring 23 so as to enclose the exposure aperture frame 10.
  • the film leader F thus having ridden thereacross is further advanced with the forward end Fa guided by the platform member 25 and reaches the film take-up chamber 6.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Details Of Cameras Including Film Mechanisms (AREA)
US06/537,423 1982-04-10 1983-09-29 Exposure aperture frame construction for camera Expired - Fee Related US4530582A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP57-149807 1982-04-10
JP1982149807U JPS5955743U (ja) 1982-10-04 1982-10-04 カメラの露光開口枠

Publications (1)

Publication Number Publication Date
US4530582A true US4530582A (en) 1985-07-23

Family

ID=15483137

Family Applications (1)

Application Number Title Priority Date Filing Date
US06/537,423 Expired - Fee Related US4530582A (en) 1982-04-10 1983-09-29 Exposure aperture frame construction for camera

Country Status (3)

Country Link
US (1) US4530582A (en])
JP (1) JPS5955743U (en])
DE (1) DE3336078A1 (en])

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4987436A (en) * 1986-09-02 1991-01-22 Asahi Kogaku Kogyo Kabushiki Kaisha Camera image plane size control device
US5255034A (en) * 1989-12-05 1993-10-19 Minolta Camera Kabushiki Kaisha Camera having an automatic film loading mechanism
US5287136A (en) * 1991-01-10 1994-02-15 Fuji Photo Film Co., Ltd. Photographic camera having an improved film transport mechanism
US5302992A (en) * 1993-07-16 1994-04-12 Eastman Kodak Company Camera with extensions for film rails
US5630189A (en) * 1996-04-03 1997-05-13 Eastman Kodak Company Easy-loading camera
US5752110A (en) * 1995-09-04 1998-05-12 Nikon Corporation Apparatus that uses a photographic film
US5774757A (en) * 1997-08-12 1998-06-30 Eastman Kodak Company Camera with film deflector pivotable about inclined axis
US5774756A (en) * 1997-08-12 1998-06-30 Eastman Kodak Company Camera with flexible film deflector
US5875366A (en) * 1995-02-21 1999-02-23 Fuji Photo Film Co., Ltd. Sprocket wheel and photo film advancing device
US5875367A (en) * 1997-08-12 1999-02-23 Eastman Kodak Company Camera with pivotable film deflector having integral torsion spring
USRE36184E (en) * 1989-12-05 1999-04-06 Minolta Co., Ltd. Camera having an automatic film loading mechanism
US5909601A (en) * 1997-06-19 1999-06-01 Eastman Kodak Company Film support for guiding film leader out of backframe opening in camera deployed when door to cartridge receiving chamber opened
US5930541A (en) * 1997-06-19 1999-07-27 Eastman Kodak Company Film guide for guiding film leader over metering sprocket in camera deployed when door to cartridge receiving chamber opened
US5940643A (en) * 1998-02-03 1999-08-17 Eastman Kodak Company Guide arrangement for facilitating insertion of film leader into easy-load camera
US6276846B1 (en) 2000-01-06 2001-08-21 Eastman Kodak Company Film platen retracted from over backframe opening in camera to uncover film support deployed to guide film leader
US8910875B2 (en) 2011-06-20 2014-12-16 Metrologic Instruments, Inc. Indicia reading terminal with color frame processing

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3383068A (en) * 1965-05-07 1968-05-14 Agfa Gevaert Ag Camera with automatic film threading means
US3463071A (en) * 1965-05-15 1969-08-26 Agfa Gevaert Ag Camera with automatic film threading device

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3383068A (en) * 1965-05-07 1968-05-14 Agfa Gevaert Ag Camera with automatic film threading means
US3463071A (en) * 1965-05-15 1969-08-26 Agfa Gevaert Ag Camera with automatic film threading device

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4987436A (en) * 1986-09-02 1991-01-22 Asahi Kogaku Kogyo Kabushiki Kaisha Camera image plane size control device
US5255034A (en) * 1989-12-05 1993-10-19 Minolta Camera Kabushiki Kaisha Camera having an automatic film loading mechanism
USRE36184E (en) * 1989-12-05 1999-04-06 Minolta Co., Ltd. Camera having an automatic film loading mechanism
US5287136A (en) * 1991-01-10 1994-02-15 Fuji Photo Film Co., Ltd. Photographic camera having an improved film transport mechanism
EP0494680B1 (en) * 1991-01-10 1996-11-27 Fuji Photo Film Co., Ltd. A photographic camera
US5302992A (en) * 1993-07-16 1994-04-12 Eastman Kodak Company Camera with extensions for film rails
US5875366A (en) * 1995-02-21 1999-02-23 Fuji Photo Film Co., Ltd. Sprocket wheel and photo film advancing device
US5752110A (en) * 1995-09-04 1998-05-12 Nikon Corporation Apparatus that uses a photographic film
US5630189A (en) * 1996-04-03 1997-05-13 Eastman Kodak Company Easy-loading camera
US5909601A (en) * 1997-06-19 1999-06-01 Eastman Kodak Company Film support for guiding film leader out of backframe opening in camera deployed when door to cartridge receiving chamber opened
US5930541A (en) * 1997-06-19 1999-07-27 Eastman Kodak Company Film guide for guiding film leader over metering sprocket in camera deployed when door to cartridge receiving chamber opened
US5875367A (en) * 1997-08-12 1999-02-23 Eastman Kodak Company Camera with pivotable film deflector having integral torsion spring
US5774756A (en) * 1997-08-12 1998-06-30 Eastman Kodak Company Camera with flexible film deflector
US5774757A (en) * 1997-08-12 1998-06-30 Eastman Kodak Company Camera with film deflector pivotable about inclined axis
US5940643A (en) * 1998-02-03 1999-08-17 Eastman Kodak Company Guide arrangement for facilitating insertion of film leader into easy-load camera
US6276846B1 (en) 2000-01-06 2001-08-21 Eastman Kodak Company Film platen retracted from over backframe opening in camera to uncover film support deployed to guide film leader
US8910875B2 (en) 2011-06-20 2014-12-16 Metrologic Instruments, Inc. Indicia reading terminal with color frame processing

Also Published As

Publication number Publication date
DE3336078A1 (de) 1984-04-05
JPH0123134Y2 (en]) 1989-07-17
JPS5955743U (ja) 1984-04-12

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AS Assignment

Owner name: FUJI PHOTO FILM CO., LTD., 210 NAKANUMA, MINAMIASH

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNORS:HARA, HIROSHI;TOBIOKA, TAKASHI;YOSHINO, TAKESHI;AND OTHERS;REEL/FRAME:004236/0514

Effective date: 19831017

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Year of fee payment: 4

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Effective date: 19930725

STCH Information on status: patent discontinuation

Free format text: PATENT EXPIRED DUE TO NONPAYMENT OF MAINTENANCE FEES UNDER 37 CFR 1.362